Abstract
Microchemical and photochemical procedures which would permit rapid, sensitive detection of atromentin, aurantiacin, and thelephoric acid were examined. Photochemically induced fluorescence and chromophore formation with a ceric ammonium sulfate (CAS) reagent were useful for this purpose, especially when the terphenyl-quinones were adsorbed on polyamide powder. Quantitation of atromentin was possible with a CAS procedure, and all three of the terphenylquinones could be quanti-tated with pyridine-water (Py–W) and combined Py–W–CAS procedures. The relative sensitivities for the quantitative methods for atromentin were CAS > Py–W–CAS > Py–W. The procedures permitted the determination of atromentin and aurantiacin in concentrations of 2 to 120 mcg./ml. and 4 to 120 mcg./ml., respectively, and of thelephoric acid in concentrations of 2 to 40 mcg./ml. Precise standardization of analytical conditions was critical.
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